基于阳离子调控的ADN防吸湿技术OA北大核心CSTPCD

Ammonium dinitramide(ADN),as a highly promising new oxidant,is still difficult to achieve large-scale applications due to its strong hygroscopicity.Numerous studies show that the strong hygroscopicity of ADN is mainly attributed to the forma-tion of hydrogen bonds between NH4+cations and water molecules in air.In this work,a novel dinitramide energetic ionic salt(DBDN)containing divalent cation was synthesized by a simple,safe and efficient one-pot reaction using terephthalaldehyde(TPA),aminoguanidine hydrochloride(AGC)and ADN as raw materials through Schiff base reaction and ion exchange reac-tion.The product was characterized by elemental analysis,infrared spectroscopy,and nuclear magnetic spectroscopy.Its physi-cal and chemical properties were tested by thermal analysis,mechanical sensitivity testing,and theoretical calculations.In addi-tion,the hygroscopicity of ADN and DBDN was studied by using the desiccator equilibrium method.The impact sensitivity(IS),friction sensitivity(FS)and thermal decomposition temperature(Td)of DBDN are>40 J,16%and 225℃,respectively.The stability of DBDN is much better than that of ADN(5 J,76%and 198℃).Under the conditions of 25℃and relative humid-ity(RH)of 66%and 75%,after 9 days,the hygroscopic rates of the ADN are as high as 24.1%and 39.5%,respectively,while those of DBDN are only 0.26%and 0.48%,showing non-hygroscopic properties of DBDN.